Collapsible core.



T. W. BAKER. GOLLAPSIBLE GORE.

APPLIGATION FILED Maze, 1910.

1,007,413, Patented Oct. 31, 1911.

A TTORNEV THOMAS W. BAKER,OF NEW YORK, N.

coLLrsIBLE CORE.

` To all whom it may concern:

Be itknown that I, THOMAS V. BAKER, a citizen of the United States, and a resident of the borough ot Brooklyn, of the cityl of New York. in the county ot Kings and State ot' New York` have invented a certain new and useful Collapsible Core, ot which the following is a specification, the same being a. t'ull, clear. and exact description ot' the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to instrnn'ients of wood, metal, or other material, designed to hold articles so as to keep them in the same desired relative posit-ion, and in particular to a gripping device provided with extensible jaws and adapted to move in unison in order to simultaneously grasp articles, as an automobile shoe, at ditlerent points` and to hold the same rigidly in the position required t'or repairing them.

The invention consists ot' a `peculiar construction and arrangement ot parts hereinvat'ter described and illustrated in the drawings which accompany and form a. part ot this specification, and in which- Figure 1 is a central longitudinal section of an article constructed according to my invention; Fig. 2 is a plan view ot' the same; and Fig. 3 is a view in detail otI a portion ot' the bottom ot' my clamping device.

Like letters ot reference indicate like parts in all the views.

Itet'erring particularly7 by reference characters or symbols to the drawings. represents a plurality otI preferably segmental supporting devices ordinarily provided with shanks A. each one being detachably engaged `with and pret'erably pivoted. as at c, to an ordinarily radially disposed reciprocat-ory member ot a distensible device, as a sliding bar or rack l1), the said bars heilig preterably constructed and arranged to work on the arms B extending trom the trame or bed B. 'lhe extensible segments A are preterably convex in contour so as to readily tit within the shoe, and the shanks are ordinarily constructed and arranged to be engaged in a movable manner. so as to work back and forth thereon. with the arms B ot' the ."rame or bed B. as tor example. in the present instance, by being formed in preferred construction with an interior hol- Specification of-Letters Patent.

. Application ined August 2e, 1910.

Patented 0615.31, 1911-. serial No. 579,059.,

low portion adapted to register with the'con- 5'5- format-ion of some portion of the said arms B.

I provide means for simultaneously operating the segmental supporting devices A, as, for example, a handle, or other manually actuated device C, which ordinarily operates the other member of my distensible de.- vice preferably consisting, as in the present instance, of a worm or spirally formed rib D, ordinarily constructed and arranged to 6,5 be continuously engaged with each of the racksE, and thereby operating the reciprocating shanks A and segments A and moving the saine in a forward and rearward direction by the sole operation of the manually actuated device, the said handle C 'being suitably att-ached in a rotatory relation with the bed B by any desired or approved fastening means, as for example, the bolt J' upon which the bed B also revolves. 75

The 'lower part. of the bed B is preferably made ot' a trusto-conical contour, and may be attached to any desired supporting means Ain a rotatory relation, by any suitable means,

as the base. consisting in the present instance of the plates (ir, G, provided ordinarily with circular undercutjaws adapted to register with and to conform in contour with the truste-coni `allower portion of the bed B. The-said plates G, G are preferably formed with orices Iz. for the .reception of screws H t'or purposes of attachment to a 'all or other support. I also preferably provide means whereby the bed B may be locked in any desired position to which it:

may be turned. as.,t'or example, by means ot gear teeth with which a dog F. ordinarily fastened to one ot' the plates G, G', may be engaged or interlocked.

ln operation. the automobile shoe may be hung on one ot' the segments A. and by manipulating the handle C the said jaws may be distended` by means otl the engagement ot' the spiral rib D with the racks E, yso as to securely hold the said shoe. i

In order to convenientlytreat dlt't'erent parts ot' the shoe when the same is beiflng repaired or re-treated. the bed B. handle'C, together .with the shoe, may be tur ed around to any desired position by releasing 105 the locking dog F trom the gear teeth 7), at'ter which the shoe and supporting base B may be securely locked again in the new l position by means of the renewed engageand simultaneously engage each o1 ne rementof the said locking dog F with the gear teeth of the bed B.

I Wish it to be understood that I do not desire to be limited to the exact details of construction shown and described herein, for various modifications will occur to a person skilled. in the art.

What ll claim as my invention, is

In a deviceof the class described, a frame or bed, a plurality o't segmental supporting devices, reciprocatory members provided with racks to engage therewith, and a circular rotatable manually actuated device .concentric with said segments to directly ciprocatory members by means` of a spirally formed rib located near the periphery of the manually actuated device to move the members practically in unison in a forward and rearward direction.

In testimony of the foregoing specification, I do hereby sign the same in the borough of Brooklyn, city of New York, county of Kings and State of New York, this 26th day of July, 1910.

THOMAS WV. BAKER.

Witnesses:

ELMER P. STARK, LOUIS ToTANs. 

